Bulk Plant cleanup site — Restorical Research
Rossoe Oil Co
9367 Rainier Ave S, Seattle, King County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a bulk fuel distribution terminal going back to 1930. Historical insurance policies issued during operations at this property and through 1986 could fund a cleanup — and recover costs already spent.

This property has operated as a fuel storage and distribution site since 1930, first as a coal yard and fuel oil company, and currently as Rossoe Energy Systems, a home heating system facility with an active underground storage tank system fueling a tanker truck fleet for home fuel delivery. The site has been on Ecology's Confirmed and Suspected Contaminated Sites List since January 1989, with diesel-range petroleum hydrocarbons and free product encountered near former USTs. Although prior cleanup actions were reported, they were never formally closed, and contamination remains on site requiring further remediation. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Bulk Plant
Address9367 Rainier Ave S, Seattle, King County
Historical UseBulk Plant
Est. Operating Since1930
StatusCleanup Started
Contamination & Investigation
Site Assessment Summary
ContaminantsDiesel-range petroleum hydrocarbons and free product detected in soil near former underground storage tanks
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Standard Cleanup
Ecology Site #8610

Why Historical Insurance Policies May Be Accessible

Pre-1986 Commercial General Liability (CGL) policies were occurrence-based and did not contain an effective pollution exclusion in Washington. If contamination occurred while those policies were active, those historical insurance carriers may still have a legal obligation to fund the cleanup costs, even if the business closed or the property changed hands.

Petroleum contamination at this property traces to fuel oil storage and distribution operations that began more than five decades before 1986, when occurrence-based Commercial General Liability policies were standard and carried no effective pollution exclusion in Washington. The site's ongoing remediation obligations — assessment, monitoring, and cleanup actions still required after more than three decades on Ecology's contamination list — represent costs that historical carriers who issued CGL policies during those pre-1986 operational decades may be obligated both to reimburse and to fund going forward.

Restorical's role is to locate viable historical policies, determine whether a successful coverage claim is possible, and assist our clients and their legal counsel to obtain insurance coverage. Restorical then manages the claim, including accounting, to ensure the cleanup is funded in a timely manner.

What We Look For

  • Historical insurance policies (pre-1986)
  • Policy numbers, carrier names, and coverage periods
  • Connection between contamination timing and policy period
  • Evidence linking cleanup obligation to insured activity

What We Deliver

  • Historical Coverage Chart
  • Trigger Analysis & Property/Policy Nexus
  • Coverage strategy with recommendations
  • Insurance funding for your remediation
  • Claims Management & Forensic Accounting

The Restorical Proven Process

Task 1 — Research and Analysis
Restorical searches for viable historical insurance policies, researches the site history, analyzes the contamination impacts, and underwrites potential coverage — including a proprietary trigger analysis. At the end of Task 1, we provide a clear yes or no on whether a successful cost recovery is possible, along with a strategy and recommendation specific to your situation, even if you are not the policyholder.
Task 2 — Coverage and Funding
When Task 1 confirms viable coverage, Restorical works with your legal counsel to tender the claim, negotiate and secure insurance coverage. Restorical will manage the ongoing claim process, including accounting to ensure the insurance companies are funding your remediation in a timely manner.

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This analysis is preliminary and based on publicly available records. Restorical Research is not a law firm and does not provide legal advice.